Virtualbox 0x178ffe7f7859f 0x1003 returning: 3f 38 00 00 00 00 00 00

Virtualbox getting stuck at 0%

Got these errors when setting up my new environment
- Warning! Unknown CPU features: 0x178ffe7f7859f
- Warning! Unknown capability 0x1003 returning: 3f 38 00 00 00 00 00 00

... with Virtualbox hanging at "Starting virtual machine ..." 0%.

Fix

As Administrator, run bcdedit /set hypervisorlaunchtype off

Background & references





These errors were both indicative of Microsoft's Hypervisor running. When trying to shut it down, it indicated that the Container Manager Service was running despite the Containers feature being disabled.


https://forums.virtualbox.org/viewtopic.php?f=6&t=92440
00:00:01.995347 NEM: Warning! Unknown CPU features: 0x178ffe7f7859f00:00:01.995354 NEM: WHvCapabilityCodeProcessorClFlushSize = 2^800:00:01.996539 NEM: Warning! Unknown capability 0x1003 returning: 3f 38 00 00 00 00 00 0000:00:01.997118 NEM: VidGetHvPartitionId            -> fun:0x2210a7 in:0x0 out:0x800:00:01.997126 NEM: VidStartVirtualProcessor       -> fun:0x221174 in:0x4 out:0x000:00:01.997130 NEM: VidStopVirtualProcessor        -> fun:0x221180 in:0x4 out:0x000:00:01.997135 NEM: VidMessageSlotHandleAndGetNext -> fun:0x2210df in:0x8 out:0x000:00:01.997374 NEM: Created partition 0000000001f99dd0.00:00:01.997560 NEM: NEMR3Init: Active.00:00:01.997635 MM: cbHyperHeap=0x140000 (1310720)00:00:01.999985 CPUM: fXStateHostMask=0x7; initial: 0x7; host XCR0=0x1f00:00:02.002601 CPUM: Matched host CPU INTEL 0x6/0x9e/0xa Intel_Core7_CoffeeLake with CPU DB entry 'Intel Core i7-6700K' (INTEL 0x6/0x5e/0x3 Intel_Core7_Skylake)00:00:02.002741 CPUM: MXCSR_MASK=0xffff (host: 0xffff)00:00:02.002779 CPUM: Microcode revision 0x0000009A00:00:02.002838 CPUM: SetGuestCpuIdFeature: Enabled PAE00:00:02.002855 CPUM: SetGuestCpuIdFeature: Enabled SYSENTER/EXIT00:00:02.002860 CPUM: SetGuestCpuIdFeature: Enabled SYSCALL/RET00:00:02.002863 CPUM: SetGuestCpuIdFeature: Enabled PAE00:00:02.002866 CPUM: SetGuestCpuIdFeature: Enabled LONG MODE00:00:02.002869 CPUM: SetGuestCpuIdFeature: Enabled LAHF/SAHF00:00:02.002872 CPUM: SetGuestCpuIdFeature: Enabled NX00:00:02.004372 VMSetError: F:\tinderbox\win-rel\src\VBox\VMM\VMMR3\NEMR3Native-win.cpp(1462) int __cdecl nemR3NativeInitAfterCPUM(struct VM *); rc=VERR_NEM_VM_CREATE_FAILED00:00:02.004518 VMSetError: Call to WHvSetupPartition failed: ERROR_SUCCESS (Last=0xc000000d/87)00:00:02.004555 NEM: Destroying partition 0000000001f99dd0 with its 0 VCpus...

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